JP2013032845A - Support member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support member having superior adhesion between members to each of which the support member is attached.SOLUTION: In the resin-made support member which supports a rotating member directly or via a bearing and has a plurality of protrusions at the outer peripheral surface, the plurality of protrusions are formed all over the outer peripheral surface at the molding of the support member, and at least a portion of the protrusions is formed into a constricted shape. The resin-made support member is manufactured by injection molding. The resin-made support member is attached into, for example, a resin-made or rubber-made outer member.

Description

  The present invention relates to a support member that supports a rotating member directly or via a bearing.

  As a support member for supporting the rotating member, for example, an anti-wear sleeve shown in Patent Document 1 is known. When forming a cast member having a support hole to support the rotating member, the sleeve is attached to the support hole of the cast member by casting, and the rotating member is slidably supported to wear the support hole. Is to prevent. The sleeve is formed with several convex portions at intervals on the outer peripheral surface so that the sleeve is surely prevented from coming off and prevented from rotating with respect to the support hole of the cast member (see FIG. 7 of Patent Document 1). .

Japanese Patent Laid-Open No. 10-131975

  However, the anti-wear sleeve shown in Patent Document 1 may be insufficient in adhesion to the cast member.

  The objective of this invention is providing the support member excellent in adhesiveness between the members with which a support member is mounted | worn.

  The present invention provides a metal support member that supports a rotating member directly or via a bearing and has a plurality of protrusions on the outer peripheral surface, wherein the plurality of protrusions are formed on the entire outer peripheral surface when the support member is cast, The protrusion of the part has a constricted shape.

It is preferable that the height of the protrusions is 0.3 to 2.0 mm and the number of protrusions is 5 to 100 / cm ² .

  The metal support member is preferably made of cast iron, cast steel, copper, copper alloy, aluminum, aluminum alloy, magnesium, or magnesium alloy.

  The metal support member is a cylindrical member or a half member. The cylindrical member is an integral member or a pair of divided half members.

  The metal support member is preferably manufactured by centrifugal casting.

  The metal support member is mounted by casting in a member made of, for example, aluminum, aluminum alloy, magnesium, or magnesium alloy. Alternatively, the metal support member is mounted by integral molding in a member made of resin or rubber.

The present invention is not limited to the metal support member, and may be a resin support member. That is,
In the resin support member that supports the rotating member directly or via a bearing and has a plurality of protrusions on the outer peripheral surface, the plurality of protrusions are formed on the entire outer peripheral surface when the support member is molded, and at least some of the protrusions are formed. It has a constricted shape.

It is preferable that the height of the protrusions is 0.3 to 2.0 mm and the number of protrusions is 5 to 100 / cm ² .

  The resin support member is a cylindrical member or a half member. The cylindrical member is an integral member or a pair of divided half members.

  The resin support member is preferably manufactured by injection molding.

  The resin support member is mounted by integral molding in a member made of, for example, resin or rubber.

  According to the support member of the present invention, the adhesion with the member to which the support member is mounted is improved, and the retaining effect and the anti-rotation effect are excellent. In addition, the support member and the member to which the support member is attached can be made thinner.

1 shows an embodiment of the present invention, (a) shows a support member that is mounted on an outer member and directly supports a rotating shaft, and is a longitudinal sectional view cut along the rotating shaft, (b) is an outer member and a supporting member. It is an expanded sectional view which shows a junction part. It is the longitudinal cross-sectional view which cut the support member part of Fig.1 (a) at right angle with the rotating shaft. Fig. 4 shows another embodiment of the present invention, in which (a) shows a support member that is mounted on an outer member and directly supports the rotation shaft, and is a longitudinal sectional view cut along the rotation shaft, (b) is an outer member and support. It is an expanded sectional view which shows a junction part with a member. It is the longitudinal cross-sectional view which cut the supporting member part of Fig.3 (a) at right angle with the rotating shaft. FIG. 4 shows still another embodiment of the present invention, in which FIG. 4A shows a supporting member that is mounted on an outer member and supports a rotating shaft via a bearing, and is a longitudinal sectional view cut along the rotating shaft; FIG. It is an expanded sectional view which shows the junction part of an outer side member and a supporting member. It is the longitudinal cross-sectional view which cut the support member part of Fig.5 (a) at right angle with the rotating shaft. FIG. 4 shows still another embodiment of the present invention, in which FIG. 4A shows a supporting member that is mounted on an outer member and supports a rotating shaft via a bearing, and is a longitudinal sectional view cut along the rotating shaft; FIG. It is an expanded sectional view which shows the junction part of an outer side member and a supporting member. It is the longitudinal cross-sectional view which cut the support member part of Fig.7 (a) at right angle with the rotating shaft. Fig. 4 shows still another embodiment of the present invention, in which (a) shows a support member that is mounted on the outer member and directly supports the rotating shaft, and is a longitudinal sectional view cut along the rotating shaft; It is an expanded sectional view which shows a junction part with a supporting member. It is the longitudinal cross-sectional view which cut the support member part of Fig.9 (a) at right angle with the rotating shaft. FIG. 4 shows still another embodiment of the present invention, in which FIG. 4A shows a supporting member that is mounted on an outer member and supports a rotating shaft via a bearing, and is a longitudinal sectional view cut along the rotating shaft; FIG. It is an expanded sectional view which shows the junction part of an outer side member and a supporting member. It is the longitudinal cross-sectional view which cut the support member part of Fig.11 (a) at right angle with the rotating shaft.

    Preferred embodiments of the present invention will be described below with reference to the drawings.

  1 and 2 are examples in which the support member directly supports the rotating shaft. A support hole 2 is formed in the metal outer member 1, and a cylindrical tubular member 3, which is a metal support member, is mounted in the support hole 2. It is supported rotatably.

  The outer member 1 is made of aluminum, an aluminum alloy, magnesium, or a magnesium alloy, and the cylindrical member 3 is attached to the support hole 2 of the outer member 1 by casting. The metallic cylindrical member 3 is made of cast iron, cast steel, copper, copper alloy, aluminum, aluminum alloy, magnesium, or magnesium alloy.

A plurality of protrusions 6 are formed on the entire outer peripheral surface 5 of the cylindrical member 3. Among these protrusions 6, some or all of the protrusions 6 have a constricted shape. The height of the protrusions 6 is 0.3 to 2.0 mm, and the number of protrusions 6 is 5 to 100 / cm ² .

When the height of the protrusion 6 is less than 0.3 mm, the adhesion is insufficient, and when the height is larger than 2.0 mm, the height of the protrusion 6 tends to be uneven and the outer diameter accuracy is lowered. When the number of the protrusions 6 is less than 5 / cm ² , the adhesiveness is insufficient, and when the number is more than 100 / cm ² , the gap between the protrusions 6 is reduced, so that the cylindrical member 3 is made of the metal outer member 1. When mounted by cast-in, or by being integrally molded in a resin or rubber member, the gap between the protrusions 6 is not sufficiently filled with metal, resin or rubber, and the adhesion tends to be insufficient. .

  The cylindrical member 3 is manufactured by a centrifugal casting method. Hereinafter, the manufacturing method of the cylindrical member 3 is demonstrated.

  A mold material is produced by mixing diatomaceous earth, bentonite (binding agent), water, and a surfactant in a predetermined ratio. A coating material is spray-coated on the inner surface of a mold (mold) that is heated to 200 to 400 ° C. to rotate, and a coating layer is formed on the inner surface of the mold. Due to the action of the surfactant, a plurality of concave holes are formed in the coating layer by bubbles of vapor generated from the coating layer. After drying the coating layer, the molten metal is cast into a rotating mold. At this time, the melt is filled in the concave holes of the coating layer, and a plurality of uniform protrusions are formed. After the molten metal is cured to form the cylindrical member, the cylindrical member is taken out from the mold together with the coating layer. By the blasting process, the mold material is removed, and a cylindrical member having a plurality of protrusions having at least a part of the constricted shape over the entire outer peripheral surface is manufactured.

  3 and 4 show another embodiment of the present invention. This embodiment is different from the above embodiment in that the support hole of the support member and the end of the rotating shaft are formed in a tapered shape.

  That is, in this embodiment, the support hole 7 that supports the rotating shaft 4 of the cylindrical member 3 is formed in a tapered shape, and the end of the rotating shaft 4 that is inserted into the support hole 7 is formed in a tapered shape. Has been. Other configurations are the same as those in the above embodiment.

  5 and 6 show still another embodiment of the present invention. The present embodiment is an example in which the support member supports the rotation shaft via a bearing, and is different from the first embodiment in that the rotation shaft is supported by the support member via the bearing. .

  That is, in this embodiment, the cylindrical member 3 is mounted in the support hole 2 of the outer member 1, and the rotating shaft 4 is rotatably supported by the support hole 7 of the cylindrical member 3 via the bearing 8. Other configurations are the same as those in the above embodiment.

  7 and 8 show still another embodiment of the present invention. This embodiment is different from the embodiment shown in FIGS. 5 and 6 in that the cylindrical member 3 is divided into two parts and is composed of a pair of half-members 3A and 3B having a semicircular cross section. ing. In the present embodiment, the outer member 1 is a connecting rod, the bearing 8 is white metal, the rotating shaft 4 is a crankshaft, and 9 is a piston.

  In this embodiment, the outer member 1, the cylindrical member 3, and the bearing 8 are divided into two. The outer member 1 is divided into two at the big end portion, and half-divided members 3A, 3B having a semicircular cross section are respectively attached to and fixed to the semicircular recesses 2A, 2B of the divided portions 1A, 1B. After the split bearings 8A and 8B are mounted, the divided portions 1A and 1B are fastened by the fastener 10. The outer peripheral surfaces 5A and 5B of the half members 3A and 3B having a semicircular cross section are formed with a plurality of projections 6 that are the same as those of the tubular member 3 shown in the above-described embodiment, and the big end of the outer member 1 is divided. The portions 1A and 1B are respectively cast.

  9 and 10 show still another embodiment of the present invention. This embodiment is different from the first embodiment in that the support member is a half member having a semicircular cross section.

  In the present embodiment, the outer member 1 is divided into two. A concave portion 2B having a semicircular cross section is formed on the joint surface of one divided portion 1B of the outer member 1, and a half member 3B having a semicircular cross section is cast into the concave portion 2B. A plurality of projections 6 that are the same as the tubular member 3 shown in the above embodiment are formed on the entire outer peripheral surface 5B of the half member 3B. A concave portion 2A having a semicircular cross section is also formed on the joint surface of the other divided portion 1A, and the rotary shaft 4 is rotatably supported in a support hole formed by the concave portion 2A and the half member 3B. Yes.

  11 and 12 show still another embodiment of the present invention. This embodiment is different from the embodiments shown in FIGS. 9 and 10 in that the support member supports the rotating shaft via a bearing.

  That is, in this embodiment, the half member 3B having a semicircular cross section is cast into the concave portion 2B of the joint surface of the one split portion 1B of the outer member 1, and the half bearing 3B is mounted on the half member 3B. ing. A halved bearing 8A is mounted in the concave portion 2A of the joint surface of the other divided portion 1A, and the rotary shaft 4 is rotatable through a bearing 8 constituted by a pair of halved bearings 8A and 8B. It is supported.

  The material of the outer member is not limited to metal, and may be made of resin or rubber. At this time, the cylindrical member 3 and the half members 3A and 3B are attached to the outer member by, for example, injection molding.

  In the above embodiment, the metal support member is shown, but there is also a resin support member. The resin support member also has the same configuration as the metal support member shown in the embodiment. The resin support member is manufactured by, for example, injection molding. That is, a coating layer having a plurality of projection-shaped concave holes is formed on the inner surface of the molding die, and a resin is injection molded into the molding die. After the resin is cured and the support member is formed, the support member is taken out of the mold together with the coating layer. By the blast treatment, the coating material is removed, and a resin support member having a plurality of protrusions having a constricted shape on at least a part of the protrusions over the entire outer peripheral surface is manufactured. The resin support member is mounted, for example, by injection molding in a resin or rubber outer member.

1 ·· Outside member 1A, 1B ·· Part 2 of outer member ··· Support holes 2A and 2B ··· Concavity 3 · · Cylindrical members 3A and 3B ·· Split member 4 · · Rotating shafts 5, 5A and 5B · · Outer surface 6 · · Protrusion 7 · · Support hole 8 · · Bearings 8A, 8B · · Half bearing 9 · · Piston 10 · · Fastener

Claims (7)

  In the resin support member that supports the rotating member directly or via a bearing and has a plurality of protrusions on the outer peripheral surface, the plurality of protrusions are formed on the entire outer peripheral surface when the support member is molded, and at least some of the protrusions are formed. A resin support member having a constricted shape. The resin support member according to claim 1, wherein a height of the protrusion is 0.3 to 2.0 mm and a number of protrusions is 5 to 100 / cm ² .   The resin support member according to claim 1, wherein the support member is a cylindrical member.   4. The resin support member according to claim 3, wherein the cylindrical member is composed of a pair of half members.   The resin support member according to claim 1, wherein the support member is a half member.   The resin support member according to claim 1, wherein the resin support member is manufactured by injection molding.   The resin support member according to any one of claims 1 to 6, wherein the resin support member is mounted in a member made of resin or rubber by integral molding.

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